A novel hierarchical Bi₈V₂O₁₇ framwork with Bi:V ratio of 4:1 encapsulated in flexible carbon nanotube-interwoven graphene hybrid membrane (Bi₈V₂O₁₇@rGO/CNTs) is constructed through a facile filtration and a following thermal reduction course. Characterization results demonstrate that nanoflake-assembled Bi₈V₂O₁₇ microflowers are intimately encapsulated into a 3D disordered network structure with certain elasticity ascribed to layered graphene and CNTs. Electrochemical measurements show that the hybrid membrane acted as a free-standing binder-free electrode exhibits reversible lithium and sodium storage capabilities with superior electrochemical performance. The modifying effect of rGO/CNTs as carbonaceous materials on the electrochemical performance improvement of Bi₈V₂O₁₇ is studied by density functional theory computations. And the reasons that lithium storage performance of the hybrid membrane electrode is better than that of sodium storage property are elucidated by theoretical calculation. The research provides experimental and theoretical basis to understand the electrochemical performance of Bi₈V₂O₁₇@rGO/CNTs electrode for lithium- and sodium-ion batteries.

通过简便的过滤和随后的步骤，构建了一种新颖的Bi ₈ V ₂ O ₁₇框架，其Bi：V比为4：1封装在柔性碳纳米管-交织的石墨烯杂化膜（Bi ₈ V ₂ O ₁₇ @ rGO / CNTs）中。热还原过程。表征结果表明，纳米片组装的Bi ₈ V ₂ O ₁₇将微花紧密包裹在3D无序网络结构中，并赋予层状石墨烯和CNT一定的弹性。电化学测量表明，杂化膜充当独立的无粘合剂电极，具有可逆的锂和钠储存能力，并具有出色的电化学性能。rGO / CNTs作为碳质材料对Bi ₈ V ₂ O ₁₇电化学性能的改善作用通过密度泛函理论计算来研究。并通过理论计算阐明了杂化膜电极的储锂性能优于储钠性能的原因。该研究为理解Bi ₈ V ₂ O ₁₇ @ rGO / CNTs锂和钠离子电池的电化学性能提供了实验和理论基础。